What Is The Formula Of The Young's Modulus?

The formula to find young's modulus is >>>>

Y = F*L /(dL*A)

where ,

Y=Young's modulus in units of pressure (F/A)
F=force
A=cross-section area
L=length
dL=change in length

Stress divided by strain

Young's modulus= Normal Stress/ Longitudinal Strain = F*L/ A* ΔL